A bank loan write-off is when the customer doesn't pay the loan and the bank writes it off as a bad debt. In a write-off, the bank includes a bad debt as an uncollectible loss on its tax return.

Write-offs is the plural of write-off

It is possible to write off a liability. When doing this, you need to write it off as 'other income'.

no you can not write off child support

To write a letter to the HR for a sick off, write sick off as the reference and address it to the HR.